CN102352501B - Method for forming corrosion inhibiting film on steel and iron surface - Google Patents
Method for forming corrosion inhibiting film on steel and iron surface Download PDFInfo
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- CN102352501B CN102352501B CN 201110300911 CN201110300911A CN102352501B CN 102352501 B CN102352501 B CN 102352501B CN 201110300911 CN201110300911 CN 201110300911 CN 201110300911 A CN201110300911 A CN 201110300911A CN 102352501 B CN102352501 B CN 102352501B
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- corrosion inhibiting
- deionized water
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Abstract
The invention relates to a method for forming a corrosion inhibiting film on a steel and iron surface, which comprises the following steps that: firstly, a steel and iron sheet is gradually ground and polished by No. 1# to 6# metallographic abrasive paper grade by grade, is cleanly washed by deionized water, is degreased by acetone and is cleanly washed by the deionized water, an oxidation film is removed through dilute sulphuric acid, and the steel and iron sheet is cleanly washed by the deionized water for use; self assembly solution is formed by diazonium salt solution with the concentration being 0.005mol/L to 0.02mol/L and dilute sulphuric acid solution with the concentration being 0.01 to 0.1mol/L; the steel and iron sheet is soaked into the mixed self assembly solution, the soakingtemperature is the room temperature, and the assembly time is 1 to 3h; cathodic polarization is carried out on electrode in the mixed solution (at the potential range being -0.5 to -1.5V), and the time is 200 to 400s. The method has the beneficial effects that the method for forming the corrosion inhibiting film on the surface of the iron and steel electrode is simple, the operation is simple andconvenient, and the corrosion inhibiting effect is excellent. Electrochemical data shows that the corrosion inhibiting efficiency of the corrosion inhibiting film in corrosion media of 0.1mol/l HCl, 0.05mol/L H2SO4 and 5 percent NaCl is respectively higher than 90 percent.
Description
Technical field
The present invention relates to corrosion inhibiting film of a kind of steel surface and preparation method thereof, belong to steel corrosion and guard technology field.
Background technology
Self-assembled film (SAMs) be the structure membrane molecule by intermolecular and and substrate between chemical action and a kind of Thermodynamically stable of spontaneous formation, the molecular film of queueing discipline.Organic molecule is formed densification, orderly self-assembled film in the metallic surface, can stop corrosive medium to the corrosion of metal base.Iron and steel has very important application in the every field of national economy, is one of most important material, and annual because of corrosion cause with a toll of about 20% of output, therefore the research to steel corrosion and protection is very important.Up to the present the self-assembly corrosion inhibition film for steel material surface mainly prepares by soaking absorption, aspect intensity, density, built-up time and the slowly-releasing efficient certain deficiency is being arranged, and traditional imidazoles film inhibitor molecule has certain toxicity simultaneously.Rapidly and efficiently eco-friendly inhibiter is significant again in exploitation.Diazonium salt be yet there are no report by the mode that self-assembly and the method that is aided with electrochemical polarization form corrosion inhibiting film at home and abroad at the surface treatment method that stops steel corrosion.
Summary of the invention
The object of the present invention is to provide a kind of method that diazonium salt is formed corrosion inhibiting film by self-assembly and the method that is aided with electrochemical polarization.Corrosion mitigating effect excellence of the present invention, environmental friendliness, and can be extended to other metals (as iron-cobalt-nickel) and alloy, excellent effect is also arranged on copper and alloy thereof.
Above-mentioned purpose of the present invention reaches with measure by following technical solution:
A. the iron and steel sheet is first through 1
#~ 6
#Number abrasive paper for metallograph is sanding and polishing step by step, and deionized water is cleaned, the acetone oil removing, and deionized water is cleaned, the dilute sulphuric acid oxide film dissolving, deionized water is cleaned, and is standby;
B. concentration is that diazonium salt solution and the concentration of 0.005 mol/L ~ 0.02 mol/L are that 0.01 ~ 0.1 mol/L dilution heat of sulfuric acid mixes composition self-assembly solution;
C. the iron and steel sheet is immersed in and mixes in the self-assembly solution, soaking temperature is room temperature, and built-up time is 1 ~ 3 h;
D. give cathodic polarization of electrode (potential range is-0.5 ~-1.5 V) in mixing solutions, the time is 200 ~ 400 s.
Beneficial effect of the present invention
The present invention is simple, easy and simple to handle in the procedure that the iron and steel electrode surface forms corrosion inhibiting film, corrosion mitigating effect is excellent, and is applicable to all steel and iron material surface.Electrochemical data shows that the corrosion inhibiting film of the present invention's preparation is at 0.1 mol/L HCl, 0.05 mol/L H
2SO
4With the inhibition efficiency of 5% NaCl corrosive medium all more than 90%.
Description of drawings
Fig. 1 is that (c) (c') electrode is at the polarization curve of different corrosion systems for a', b' with inhibitor film is arranged for a, b for no inhibitor film.
Embodiment
A kind of steel surface forms the method for corrosion inhibiting film, comprises the following steps: that specifically 1. is first through 1 with the iron and steel sheet
#~ 6
#Number abrasive paper for metallograph is sanding and polishing step by step, and deionized water is cleaned, the acetone oil removing, and deionized water is cleaned, and the dilute sulphuric acid rust cleaning is after deionized water is cleaned, standby; 2. concentration is that diazonium salt solution and the concentration of 0.008 mol/L are that 0.015 mol/L dilution heat of sulfuric acid is formed mixing self-assembly solution; 3. the iron and steel sheet is immersed in and mixes in the self-assembly solution, soaking temperature is room temperature, and built-up time is 1.5 h; 4. give cathodic polarization of iron and steel electrode (electromotive force is-1.0 V) in mixing solutions, the time is 180 s.The present invention is described in detail below in conjunction with embodiment:
A. solution allocation
P-nitrophenyl diazonium tetrafluoroborate: C
6H
4BF
4N
3O
2, white crystalline powder, water-soluble.The corrosion test system is 0.1 mol/L HCl, 0.05 mol/L H
2SO
4With 5 % NaCl.Used vessel are all used deionized water wash in the experiment, and deionized water is all used in all solution preparations.
B. iron and steel electrode
The iron and steel electrode is that steel plate or iron plate cutting form, and thickness is 0.6 mm.Electrode area is 2 cm
2, modify and measure preceding with 1
#~ 6
#Abrasive paper for metallograph is sanding and polishing step by step, and deionized water is cleaned, and uses the acetone oil removing then, and deionized water is cleaned, and dilute sulphuric acid goes out oxide film, and deionized water is cleaned the back and immersed assembling liquid.
C. experiment test
Experiment is carried out in three-electrode system, and working electrode is unassembled and the soft steel electrode of assembling diazonium salt, and supporting electrode and reference electrode are respectively Pt electrode and saturated calomel electrode (SCE).CHI660D type electrochemical workstation (Shanghai occasion China) is used in the measurement of polarization curve, and scanning speed is 10 mV/s, and sweep limit is-0.3 ~-0.8 V.
Table 1 is corrosion potential, corrosion current and the inhibition efficiency table that does not have corrosion inhibiting film and the iron and steel electrode of corrosion inhibiting film is arranged in different corrosive mediums.Fig. 1 be the polarization curve of iron and steel sheet in different corrosive mediums that corrosion inhibiting film and no corrosion inhibiting film arranged (curve a be blank electrode in 0.1 mol/L HCl corrosive medium, a' be corrosion inhibiting film arranged electrode in 0.1 mol/L HCl corrosive medium, b is that blank electrode is at 0.05 mol/L H
2SO
4In the corrosive medium, b' has the electrode of corrosion inhibiting film at 0.05 mol/L H
2SO
4In the corrosive medium, c be blank electrode in 5% NaCl corrosive medium, c' has the electrode of corrosion inhibiting film in 5% NaCl corrosive medium), list in table 1 in this relevant electrochemical data, (inhibition efficiency (Inhibition Efficiency) wherein,
,
With
Be expressed as and do not have the corrosion current of corrosion inhibiting film respectively).
Table 1 does not have corrosion inhibiting film and corrosion potential, corrosion current and the inhibition efficiency table of the iron and steel electrode of corrosion inhibiting film is arranged in different corrosive mediums
By can obviously finding out in the table 1 no matter be the sort of corrosive medium, there is the corrosion current of the iron and steel electrode of assembling inhibitor film all much smaller than the corrosion current of blank iron and steel electrode, the iron and steel electrode that the assembling corrosion inhibiting film arranged simultaneously in that moving to the low potential direction in various degree all arranged aspect the corrosion potential, illustrates that prepared inhibitor film type is the cathode type inhibiter than blank electrode.
Claims (1)
1. the method for a steel surface formation corrosion inhibiting film is characterized in that this method comprises the following steps:
A. steel or iron plate is first through 1
#~ 6
#Number abrasive paper for metallograph is sanding and polishing step by step, and deionized water is cleaned, the acetone oil removing, and deionized water is cleaned, the dilute sulphuric acid oxide film dissolving, deionized water is cleaned, and is standby;
B. concentration is that oil of mirbane diazonium tetrafluoroborate solution and the concentration of 0.005 mol/L ~ 0.01 mol/L are that 0.01 ~ 0.015 mol/L dilution heat of sulfuric acid mixes composition self-assembly solution;
C. the iron and steel sheet is immersed in and mixes in the self-assembly solution, soaking temperature is room temperature, and built-up time is 1 ~ 3 h;
D. giving cathodic polarization potential range of electrode in mixing solutions is-0.5 ~-1.5 V, and the time is 200 ~ 400 s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110300911 CN102352501B (en) | 2011-10-09 | 2011-10-09 | Method for forming corrosion inhibiting film on steel and iron surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110300911 CN102352501B (en) | 2011-10-09 | 2011-10-09 | Method for forming corrosion inhibiting film on steel and iron surface |
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| Publication Number | Publication Date |
|---|---|
| CN102352501A CN102352501A (en) | 2012-02-15 |
| CN102352501B true CN102352501B (en) | 2013-09-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018114371A1 (en) * | 2016-12-23 | 2018-06-28 | Henkel Ag & Co. Kgaa | Compositions comprising diazonium ions for corrosion-protective pretreatment of metallic components |
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| CN104934885A (en) * | 2015-06-01 | 2015-09-23 | 含山县兴达球墨铸铁厂 | Preparation method for top cover of distribution box |
| CN104934862A (en) * | 2015-06-01 | 2015-09-23 | 含山县兴达球墨铸铁厂 | Door for power distribution cabinet |
| CN106555137B (en) * | 2016-11-30 | 2017-12-29 | 西安石油大学 | A kind of manufacture method of corrosion resisting alloy hot finished steel pipe |
| EP3392373A1 (en) | 2017-04-20 | 2018-10-24 | Henkel AG & Co. KGaA | Compositions containing primary aromatic amines for the corrosion protection pretreatment of metallic components |
| CN109881202A (en) * | 2019-03-08 | 2019-06-14 | 楚雄师范学院 | A kind of preparation method of steel surface corrosion inhibition film |
| CN113445053B (en) * | 2021-06-17 | 2022-11-08 | 上海大学 | Compound corrosion inhibitor of Mg-Al series alloy and preparation method and application thereof |
| CN115386928A (en) * | 2022-09-15 | 2022-11-25 | 哈尔滨工程大学 | Preparation method of corrosion inhibition type corrosion product film for reducing hydrogen damage of pipeline steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4306988A (en) * | 1980-11-10 | 1981-12-22 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles and their use as corrosion inhibitors |
| CN101693995A (en) * | 2009-09-08 | 2010-04-14 | 上海波平航空科技有限公司 | Preparation method of aluminum alloy corrosion resistant coating |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090056994A1 (en) * | 2007-08-31 | 2009-03-05 | Kuhr Werner G | Methods of Treating a Surface to Promote Metal Plating and Devices Formed |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4306988A (en) * | 1980-11-10 | 1981-12-22 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles and their use as corrosion inhibitors |
| CN101693995A (en) * | 2009-09-08 | 2010-04-14 | 上海波平航空科技有限公司 | Preparation method of aluminum alloy corrosion resistant coating |
Non-Patent Citations (1)
| Title |
|---|
| CN1O1693995A 2010.04.14 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018114371A1 (en) * | 2016-12-23 | 2018-06-28 | Henkel Ag & Co. Kgaa | Compositions comprising diazonium ions for corrosion-protective pretreatment of metallic components |
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